CN101053284A - Electronic ballast with remote capacitor placement - Google Patents
Electronic ballast with remote capacitor placement Download PDFInfo
- Publication number
- CN101053284A CN101053284A CNA2005800379483A CN200580037948A CN101053284A CN 101053284 A CN101053284 A CN 101053284A CN A2005800379483 A CNA2005800379483 A CN A2005800379483A CN 200580037948 A CN200580037948 A CN 200580037948A CN 101053284 A CN101053284 A CN 101053284A
- Authority
- CN
- China
- Prior art keywords
- housing
- bus
- electric ballast
- transducer
- condenser circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
- H05B41/14—Circuit arrangements
- H05B41/24—Circuit arrangements in which the lamp is fed by high frequency ac, or with separate oscillator frequency
- H05B41/245—Circuit arrangements in which the lamp is fed by high frequency ac, or with separate oscillator frequency for a plurality of lamps
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
- H05B41/14—Circuit arrangements
- H05B41/26—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc
- H05B41/28—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
- H05B41/14—Circuit arrangements
- H05B41/26—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc
- H05B41/28—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters
- H05B41/282—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
Landscapes
- Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
Abstract
An electronic ballast with remote capacitor placement includes a first housing (34); a second housing (36); an AC/DC converter (22); a DC bus (24) operably connected to the AC/DC converter (22); a lamp driver (26) operably connected to the DC bus (24); and a storage capacitor (32) connected to the DC bus (24) with capacitor wires (30). The AC/DC converter (22), the DC bus (24), and the lamp driver (26) are disposed in the first housing (34); the storage capacitor (32) is disposed in the second housing (36); and the first housing (34) is thermally isolated and physically separated from the second housing (36).
Description
This invention relates generally to electric ballast, in particular to the electric ballast with remote capacitor placement.
The electric ballast of using that is used to throw light on uses two energy conversion stages usually: the AC/DC transducer and the lamp driver that is used for driving according to the DC bus voltage lamp that are used for the AC line voltage is converted to dc voltage.The DC bus comprises the capacitor as energy storage elements, and it remains on the DC bus voltage on the almost constant value.
During operation, produce heat in the resistance loss of electric ballast from power semiconductor and other active parts.The heat that is generated makes the ballast housing temperature inside increase and surpasses ambient temperature, to such an extent as to the parts of ballast housing inside are worked on ambient stable.In this electric ballast, holding capacitor is positioned at the inside of housing and works on higher case temperature.When surpassing normal working temperature, capacitor life-span is reduced, according to 2 power is inferior to such an extent as to make working temperature higher in the housing reduce life of capacitors along with the working temperature increase.For example, if capacitor is worked being higher than on 10 ℃ of normal working temperature, capacitor life-span reduces half so, if but capacitor work being lower than on 10 ℃ of normal working temperature, capacitor life-span doubles so.
In illumination was used, electric ballast was installed in the illuminating equipment of ceiling annex, has wherein gathered hot-air.Also increased the temperature of illuminating equipment such as HID and the such hot-fluid that light source generated of incandescent lamp.The ambient temperature that is increased around the illuminating equipment has increased the internal work temperature of illuminating equipment and ballast, makes capacitor be subjected to the influence of elevated operating temperature.Because capacitor is the critical piece of electric ballast, so elevated operating temperature causes too early damage of capacitor and too early replacing ballast, has wasted resource and has caused extra maintenance.
Making electric ballast have remote capacitor placement is desired to overcome above-mentioned defective.
One aspect of the present invention provides a kind of electric ballast, and it comprises first housing; Second housing; The AC/DC transducer; Can be operationally connected to the DC bus of AC/DC transducer; Can be operationally connected to the lamp driver of DC bus; And utilize condenser circuit and be connected to the holding capacitor of DC bus.AC/DC transducer, DC bus and lamp driver are placed in first housing; Holding capacitor is placed in second housing; And first housing and second housing heat isolate and physics separates.
According to a further aspect of the invention, provide a kind of electronic ballast system, comprising: first device is used to hold AC/DC transducer, DC bus and lamp driver; Second device is used to hold holding capacitor; And the device that is used to be electrically connected DC bus and holding capacitor.First storing apparatus and second storing apparatus heat are isolated also, and physics separates.
According to another aspect of the invention, provide a kind of electric ballast, comprising: first housing; Second housing; AC/DC transducer, AC/DC transducer are operably connected to the civil power input; Can be operationally connected to the DC bus of AC/DC transducer; Can be operationally connected to the lamp driver of DC bus, this lamp driver is operably connected to lamp output; Operationally be connected across the filter on the DC bus; And utilize condenser circuit to be connected to the holding capacitor of filter.AC/DC transducer, DC bus, filter and lamp driver are placed in first housing; Holding capacitor is placed in second housing; And first housing and second housing heat isolate and physics separates.
In conjunction with the accompanying drawings, according to following detailed description of the currently preferred embodiments, the feature of front of the present invention and other features and advantage will become further obviously.Detailed description and accompanying drawing only are illustrative for the present invention, and nonrestrictive, scope of the present invention is limited by claims and equivalent thereof.
Fig. 1 is the schematic diagram with electric ballast of remote capacitor placement produced according to the present invention; And
Fig. 2 and 3 is the schematic diagrames of physical arrangement with electric ballast of remote capacitor placement produced according to the present invention.
Fig. 1 is the schematic diagram with electric ballast of remote capacitor placement produced according to the present invention.Electric ballast 20 receives city's electrical power and in lamp output 18 power is provided to lamp from civil power input 16.Electric ballast 20 comprises the AC/DC transducer 22 that operationally is connected to lamp driver 26 via DC bus 24, and cross-over connection is connected the filter 28 on the DC bus 24, and the condenser circuit 30 that holding capacitor 32 is connected to filter 28.AC/DC transducer 22, DC bus 24, lamp driver 26 and filter 28 are placed in first housing 34.Holding capacitor 32 is placed in second housing 36 and can is a capacitor or can is a plurality of capacitors in parallel and/or that polyphone connects.First housing 34 and second housing 36 heat are each other isolated.In one embodiment, omit filter 28, and condenser circuit 30 is directly connected to DC bus 24.In optional embodiment, filter 28 is positioned at first housing, 34 places of first housing, 34 outsides.
AC/DC transducer 22, DC bus 24, lamp driver 26 and holding capacitor 32 be with typically in electric ballast the same conventional components of the parts that use.AC/DC transducer 22, DC bus 24 and lamp driver 26 are hot production parts of electric ballast 20, and just they comprise MOSFET, diode, resistor, magnetic part etc., and they generate heat at the electric ballast duration of work.Holding capacitor 32 produces heat seldom, but its life-span is subjected to the influence of working temperature.With holding capacitor 32 be placed on first housing 34 in hot production part heat second housing 36 of isolating in make holding capacitor 32 remain on lower temperature and increase the working life of capacitor.
Power semiconductor in the switching AC/DC transducer 22 and lamp driver 26 are to generate high-frequency current on the switching frequency.Filter 28 reductions flow to the high-frequency current of condenser circuit 30 to avoid producing electromagnetic interference (EMI) at condenser circuit 30 from DC bus 24.Size such as the such filtering capacitor 38 of film capacitor is specified to and can provides enough electric capacity in first housing 34, to such an extent as to make the high-frequency current filtering capacitor 38 of flowing through.The differential mode EMI coil 40 that is connected with holding capacitor 32 also suppresses the high-frequency current holding capacitor 32 of flowing through.Differential mode EMI coil 40 and common mode EMI coil 44 have guaranteed that electric ballast 20 meets electromagnetic compatibility (EMC) requirement.It will be understood by those skilled in the art that the filter requirement depends on the shielding of the customized configuration and the specific features of desired electric ballast.In one embodiment, omit filter 28 and condenser circuit 30 is directly connected to DC bus 24.
In one embodiment, condenser circuit 30 is that a kind of shielded conductor is right, and it has the shielding 48 that property-line 50 is electrically connected to the public ground of civil power input 16.Shown in example in, ground wire 50 is walked around first housing 34 in its outside.In optional embodiment, ground wire 50 is positioned at the inside of first housing 34, perhaps make the inside of its part at first housing 34, part is in the outside of first housing 34.In another optional embodiment, at an easy rate condenser circuit 30 is disassembled from filter 28 and/or holding capacitor 32, to such an extent as to condenser circuit 30 can be provided with prefabricated length or can irrespectively replace holding capacitor 32 with the parts in first housing 34.
Fig. 2 and 3 is the schematic diagrames of physical arrangement with electric ballast of remote capacitor placement produced according to the present invention, wherein similar element and the shared similar Reference numeral of Fig. 1.Hot each other isolation of first housing and second housing and physics separate.Heat be isolated in this be defined as with isolated the same, to such an extent as to make the heat that hot production part produced in first housing not increase the temperature of holding capacitor in second housing.Any heat that comes from hot production part was delivered to condenser circuit by conduction pattern and dissipates before it arrives holding capacitor.
With reference to figure 2, the first housings 34 and second housing 36 by space 60 each other physics separate and heat is isolated.Space 60 can be the size of any desired.For example, can be positioned at room supercentral overhead illumination equipment place to first housing 34, can be positioned at second housing 36 in the corner in room.Except condenser circuit 30, also have parts also can be placed in the space 60.For example, can be positioned at first housing 34 overhead illumination equipment place at center, room, and can be positioned at the ceiling top to second housing 36, this ceiling is placed in the space 60.
With reference to figure 3, by the 3rd housing 62 make win housing 34 and second housing 36 each other physics separate and heat is isolated.Except condenser circuit 30, also have parts also can be placed in the 3rd housing 62.For example, first housing 34 can be positioned on the end of illuminating equipment, can be in the 3rd housing 62 and/or attached on the 3rd housing 62 with the illuminating equipment positioning parts of lamp and other, and can be positioned at second housing 36 end opposite of described illuminating equipment.
Though embodiments of the invention disclosed herein are considered to preferably without departing from the scope of the invention, can produce variations and modifications at present.Scope of the present invention is indicated by claims, and is confirmed as being contained in wherein with the interior all changes of scope on the equivalent meaning.
Claims (24)
1. electric ballast comprises:
First housing 34;
Second housing 36;
AC/DC transducer 22;
Can be operationally connected to the DC bus 24 of AC/DC transducer 22;
Can be operationally connected to the lamp driver 26 of DC bus 24; And
Operationally utilize condenser circuit 30 and be connected to the holding capacitor 32 of DC bus 24;
Wherein AC/DC transducer 22, DC bus 24 and lamp driver 26 are placed in first housing 34;
Holding capacitor 32 is placed in second housing 36; And
Hot each other isolation of first housing 34 and second housing 36 and physics separate.
2. electric ballast as claimed in claim 1 further comprises the filter 28 that is connected electrically between DC bus 24 and the condenser circuit 30, and this filter 28 is placed in first housing, 34 places.
3. electric ballast as claimed in claim 2, its median filter 28 comprises:
Filtering capacitor 38;
Differential mode EMI coil 40; And
Common mode EMI coil 42, common mode EMI coil 42 have an EMI coil 44 of magnetic coupling to the two EMI coils 46;
Wherein filtering capacitor 38 parallel connections are connected across on the DC bus 24;
A differential mode EMI coil 40 and an EMI coil 44 are connected between first lead of first side of DC bus 24 and condenser circuit 30; And
The 2nd EMI coil 46 is connected between second lead of second side of DC bus and condenser circuit 30.
4. electric ballast as claimed in claim 1, wherein holding capacitor 32 comprises a plurality of capacitors.
5. electric ballast as claimed in claim 1, wherein condenser circuit 30 is that shielded conductor is right, it has the shielding 48 that is electrically connected to public ground.
6. electric ballast as claimed in claim 1, wherein second housing 36 is metal shells of ground connection.
7. electric ballast as claimed in claim 1 further is included in the space 60 that forms between first housing 34 and second housing 36.
8. electric ballast as claimed in claim 1 further comprises the 3rd housing 62 that is placed between first housing 34 and second housing 36.
9. electric ballast as claimed in claim 1 is wherein selected first housing 34 from the group of being made of metal shell and plastic casing.
10. electric ballast as claimed in claim 1 is wherein selected second housing 36 from the group of being made of metal shell and plastic casing.
11. an electronic ballast system comprises:
First device is used to hold AC/DC transducer, DC bus and lamp driver;
Second device is used to hold holding capacitor; And
Be used to be electrically connected the device of DC bus and holding capacitor;
Wherein isolation of first storing apparatus and second storing apparatus heat and physics separate.
12. system as claimed in claim 11 further comprises the device that is used for the high-frequency current of jockey is carried out filtering.
13. system as claimed in claim 11 further comprises the device that is used to shield described jockey.
14. an electric ballast comprises:
First housing 34;
Second housing 36;
AC/DC transducer 22, AC/DC transducer 22 are operably connected to civil power input 16;
Can be operationally connected to the DC bus 24 of AC/DC transducer 22;
Can be operationally connected to the lamp driver 26 of DC bus 24, lamp driver 26 is operably connected to lamp output 18;
Operationally cross-over connection is connected the filter 28 on the DC bus 24; And
Operationally utilize condenser circuit 30 and be connected to the holding capacitor 32 of filter 28;
Wherein AC/DC transducer 22, DC bus 24, filter 28 and lamp driver 26 are placed in first housing 34;
Holding capacitor 32 is placed in second housing 36; And
First housing 34 separates with 36 heat isolation of second housing and physics.
15. electric ballast as claimed in claim 14, its median filter 28 comprises:
Filtering capacitor 38;
Differential mode EMI coil 40; And
Common mode EMI coil 42, common mode EMI coil 42 have an EMI coil 44 of magnetic coupling to the two EMI coils 46;
Wherein filtering capacitor 38 cross-over connections in parallel are connected on the DC bus 24;
A differential mode EMI coil 40 and an EMI coil 44 are connected between first lead of first side of DC bus 24 and condenser circuit 30; And
The 2nd EMI coil 46 is connected between second lead of second side of DC bus and condenser circuit 30.
16. electric ballast as claimed in claim 14, wherein condenser circuit 30 is that shielded conductor is right, and it has the shielding 48 that is electrically connected to public ground.
17. electric ballast as claimed in claim 14 further is included in the space 60 that forms between first housing 34 and second housing 36.
18. electric ballast as claimed in claim 14 further comprises the 3rd housing 62 that is placed between first housing 34 and second housing 36.
19. an electric ballast comprises:
First housing 34;
AC/DC transducer 22;
Can be operationally connected to the DC bus 24 of AC/DC transducer 22;
Can be operationally connected to the lamp driver 26 of DC bus 24; And
Operationally utilize condenser circuit 30 and be connected to the holding capacitor 32 of DC bus 24;
Wherein AC/DC transducer 22, DC bus 24 and lamp driver 26 are placed in first housing 34; And
First housing 34 is isolated with holding capacitor 32 heat and physics separates.
20. electric ballast as claimed in claim 19 further comprises the filter 28 that is connected electrically between DC bus 24 and the condenser circuit 30, this filter 28 is placed in first housing, 34 places.
21. electric ballast as claimed in claim 20, its median filter 28 comprises:
Filtering capacitor 38;
Differential mode EMI coil 40; And
Common mode EMI coil 42, common mode EMI coil 42 have an EMI coil 44 of magnetic coupling to the two EMI coils 46;
Wherein filtering capacitor 38 cross-over connections in parallel are connected on the DC bus 24;
A differential mode EMI coil 40 and an EMI coil 44 are connected between first lead of first side of DC bus 24 and condenser circuit 30; And
The 2nd EMI coil 46 is connected between second lead of second side of DC bus and condenser circuit 30.
22. electric ballast as claimed in claim 19, wherein holding capacitor 32 comprises a plurality of capacitors.
23. electric ballast as claimed in claim 19, wherein condenser circuit 30 is that shielded conductor is right, and it has the shielding 48 that is electrically connected to public ground.
24. electric ballast as claimed in claim 19 is wherein selected first housing 34 from the group of being made of metal shell and plastic casing.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US62488704P | 2004-11-04 | 2004-11-04 | |
US60/624,887 | 2004-11-04 |
Publications (1)
Publication Number | Publication Date |
---|---|
CN101053284A true CN101053284A (en) | 2007-10-10 |
Family
ID=35639427
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CNA2005800379483A Pending CN101053284A (en) | 2004-11-04 | 2005-11-03 | Electronic ballast with remote capacitor placement |
Country Status (5)
Country | Link |
---|---|
US (1) | US7656670B2 (en) |
EP (1) | EP1810551A1 (en) |
JP (1) | JP2008519413A (en) |
CN (1) | CN101053284A (en) |
WO (1) | WO2006048835A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102202437A (en) * | 2010-03-23 | 2011-09-28 | 欧司朗有限公司 | LED (light emitting diode) driver, LED lamp and luminaire with LED lamp |
CN108521843A (en) * | 2015-12-17 | 2018-09-11 | 伟肯有限公司 | Filtering arranges |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2017033670A (en) * | 2015-07-29 | 2017-02-09 | 東芝ライテック株式会社 | Lamp lighting device and irradiation device |
US11296513B2 (en) * | 2017-07-21 | 2022-04-05 | Mitsubishi Electric Corporation | Station building power supply |
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DE2718151A1 (en) * | 1976-06-02 | 1977-12-22 | Gen Electric | PULSE CIRCUIT FOR GAS DISCHARGE LAMPS |
US4503360A (en) | 1982-07-26 | 1985-03-05 | North American Philips Lighting Corporation | Compact fluorescent lamp unit having segregated air-cooling means |
DE3505883C1 (en) * | 1985-02-20 | 1986-07-24 | Westermann, Wolfgang, Dipl.-Ing., 6800 Mannheim | Flat winding capacitor with metallized plastic films in chip design and process for its production |
DE68920513T2 (en) * | 1988-08-31 | 1995-05-04 | Hitachi Ltd | Inverter device. |
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DE19680254B4 (en) * | 1995-02-28 | 2007-01-04 | Matsushita Electric Works Ltd., Kadoma-Shi | discharge lamp lighting |
US5636112A (en) | 1995-07-13 | 1997-06-03 | Compaq Computer Corporation | Portable computer having built-in AC adapter incorporating a space efficient electromagnetic interference filter |
US6107744A (en) * | 1995-11-29 | 2000-08-22 | Bavaro; Joseph P. | Back-up electrical systems |
US5703440A (en) | 1996-05-13 | 1997-12-30 | General Electric Company | Compact fluorescent lamp and ballast arrangement with inductor directly between lamp ends |
US5820252A (en) * | 1996-11-21 | 1998-10-13 | Finch; David H. | Light fixture housing |
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US5905647A (en) * | 1997-01-20 | 1999-05-18 | Kabushiki Kaisha Toshiba | Inverter with incorporated filter circuit and improved component cooling arrangement |
US6118651A (en) * | 1997-12-24 | 2000-09-12 | Philips Electronics North America Corp. | Flat electrolytic capacitor |
US6795283B2 (en) * | 2001-04-20 | 2004-09-21 | Texas Instruments Incorporated | Electricals package integrating run capacitor, motor protector and motor starter |
US6642671B2 (en) * | 2001-08-27 | 2003-11-04 | Matsushita Electric Industrial Co., Ltd. | Electrodeless discharge lamp |
JP2003086389A (en) | 2001-09-07 | 2003-03-20 | Denso Corp | Discharge lamp device |
US6605900B2 (en) * | 2001-10-17 | 2003-08-12 | Yung-Lin Chien | Rechargeable emergency lamp tube |
US6700331B2 (en) * | 2002-06-05 | 2004-03-02 | Lusa Lighting, Inc. | Control circuit for dimming fluorescent lamps |
JP4367754B2 (en) * | 2002-10-31 | 2009-11-18 | 株式会社村田製作所 | Fluorescent lamp lighting device |
-
2005
- 2005-11-03 US US11/718,551 patent/US7656670B2/en not_active Expired - Fee Related
- 2005-11-03 JP JP2007539690A patent/JP2008519413A/en active Pending
- 2005-11-03 CN CNA2005800379483A patent/CN101053284A/en active Pending
- 2005-11-03 WO PCT/IB2005/053593 patent/WO2006048835A1/en active Application Filing
- 2005-11-03 EP EP05798928A patent/EP1810551A1/en not_active Withdrawn
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102202437A (en) * | 2010-03-23 | 2011-09-28 | 欧司朗有限公司 | LED (light emitting diode) driver, LED lamp and luminaire with LED lamp |
CN108521843A (en) * | 2015-12-17 | 2018-09-11 | 伟肯有限公司 | Filtering arranges |
CN108521843B (en) * | 2015-12-17 | 2020-06-16 | 伟肯有限公司 | Filter arrangement |
US10720772B2 (en) | 2015-12-17 | 2020-07-21 | Vacon Oy | Filtering arrangement having a three phase LCL power supply common mode filter |
Also Published As
Publication number | Publication date |
---|---|
US7656670B2 (en) | 2010-02-02 |
US20080012505A1 (en) | 2008-01-17 |
JP2008519413A (en) | 2008-06-05 |
WO2006048835A1 (en) | 2006-05-11 |
EP1810551A1 (en) | 2007-07-25 |
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C06 | Publication | ||
PB01 | Publication | ||
C10 | Entry into substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20071010 |